ACE blood test

Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test.

Also known as: Serum angiotensin-converting enzyme and SACE

Definition

The ACE test measures the level of angiotensin-converting enzyme (ACE) in the blood.

How the Test is Performed

A blood sample is needed.

How to Prepare for the Test

Follow your health care provider's instructions for not eating or drinking anything for up to 12 hours before the test. If you are on steroid medicine, ask your provider if you need to stop the medicine before the test, because steroids can decrease ACE levels. Do not stop any medicine before talking to your provider.

How the Test will Feel

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or slight bruising. These soon go away.

Why the Test is Performed

This test is commonly ordered to help diagnose and monitor a disorder called sarcoidosis. People with sarcoidosis may have their ACE level tested regularly to check how severe the disease is and how well treatment is working.

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Review date:

January 11, 2013

Reviewed by:

David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.

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